Blinker
Blinker  
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Pattern type  Muttering moat Oscillator  

Number of cells  3  
Bounding box  3×3  
Period  2  
Mod  1  
Heat  4  
Volatility  0.80  
Discovered by  John Conway  
Year of discovery  1970  
 
 

The blinker is the smallest and most common oscillator, found by John Conway in March 1970. It is one of only a handful of known oscillators that is a polyomino, and it is the only known oscillator that is one cell thick (although the pentadecathlon is "almost" one cell thick in that there is a one cell thick pattern that is a grandparent of it).
Blinkers are very commonly formed in a set of four called the traffic light; they can similarly be born in two potential sets of six, the interchanges. There is also a fairly common constellation of four blinkers and two boatties.
Commonness
The blinker is more than one hundred times as common in Achim Flammenkamp's census as the second most common oscillator, the toad.^{[1]} The blinker is also the second most common object on Adam P. Goucher's Catagolue.^{[2]}
References
 ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
 ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
External links
 Patterns that can be constructed with 2 gliders
 Patterns
 Oscillators
 Muttering moats
 Patterns with 3 cells
 Oscillators with 3 cells
 Oscillators with period 2
 Oscillators with heat 4
 Oscillators with volatility 0.80
 Patterns found by John Conway
 Patterns found in 1970
 Oscillators with mod 1
 Patterns with rectangular orthogonal symmetry
 Flipping oscillators